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Welcome to the ultimate list of resources for formal verification techniques and tools. This repository aims to provide an organized collection of high-quality resources to help professionals, researchers, and enthusiasts stay updated and advance their knowledge in the field.

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Awesome Formal Verification

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Welcome to the ultimate list of resources for formal verification/model checking techniques and tools. This repository aims to provide an organized collection of high-quality resources to help professionals, researchers, and enthusiasts stay updated and advance their knowledge in the field.

Inspired by awesome-provable and awesome-open-hardware-verification!

Table of Contents

  • Software

    • Tools which contain or implement verification related functionality
    • Languages - Languages with good ability to use formal type safety
  • Hardware

    • Tools which contain or implement verification related functionality
    • Languages - Languages with good ability to use formal type safety
  • Books - Textbooks commonly referred to

  • Courses - Online courses (YouTube, university courses)

  • Testbench Frameworks which make writing testbenches easier

  • Verification Guides and blog posts on how to actually go about verifying a hardware design

  • Conferences where new work on open source hardware verification is talked about

  • More Links - Video presentations about formal proof of code topics

Software verification

Tools/Proof Assistants

Formal Verification

  • Panther - This tool presents a novel approach to bolstering network protocol verification by integrating the Shadow network simulator with the Ivy formal verification tool to check time properties. Furthermore, it extends Ivy’s capabilities with a dedicated time module, enabling the verification of complex quantitative-time properties.
  • ivy - IVy is a research tool/language intended to allow interactive development of protocols and their proofs of correctness and to provide a platform for developing and experimenting with automated proof techniques.
  • Uppaal - Uppaal is an integrated tool environment for modeling, validation and verification of real-time systems modeled as networks of timed automata, extended with data types (bounded integers, arrays, etc.).
  • BLAST - BLAST is a software model checker for C programs. The goal of BLAST is to be able to check that software satisfies behavioral properties of the interfaces it uses. Blast uses counterexample-driven automatic abstraction refinement to construct an abstract model which is model checked for safety properties. The abstraction is constructed /on-the-fly/, and only to the /required precision/. The BLAST project is supported by the National Science Foundation .
  • PRISM - PRISM is a probabilistic model checker, a tool for formal modelling and analysis of systems that exhibit random or probabilistic behaviour. It has been used to analyse systems from many different application domains, including communication and multimedia protocols, randomised distributed algorithms, security protocols, biological systems and many others.
  • SPIN - Spin is a widely used open-source software verification tool. The tool can be used for the formal verification of multi-threaded software applications. The tool was developed at Bell Labs in the Unix group of the Computing Sciences Research Center, starting in 1980, and has been available freely since 1991. Spin continues to evolve to keep pace with new developments in the field. In April 2002 the tool was awarded the ACM System Software Award. [read more]
  • TLA+ - TLA+ is a high-level language for modeling programs and systems--especially concurrent and distributed ones. It's based on the idea that the best way to describe things precisely is with simple mathematics.
  • Coq - Formal proof management system.
  • Isabelle - Generic proof assistant.
  • HOL - Proof assistant for higher-order logic.
  • LEAN - Theorem prover developed at Microsoft Research.
  • K Framework - Rewrite-based executable semantic framework.
  • Viper - Language and tools for permission-based reasoning.

Simulation

  • Panther - This tool presents a novel approach to bolstering network protocol verification by integrating the Shadow network simulator with the Ivy formal verification tool to check time properties. Furthermore, it extends Ivy’s capabilities with a dedicated time module, enabling the verification of complex quantitative-time properties.

Build Systems and Continuous Integration

/

Test / Program / Code Generators

/

Coverage

Linting and Parsing

  • ivy-syntax-highlight - Bare minimum syntax highlight definitions (most likely incomplete) for the Ivy language.

Languages

  • ivy - IVy is a research tool/language intended to allow interactive development of protocols and their proofs of correctness and to provide a platform for developing and experimenting with automated proof techniques.
  • Caml - Caml is a general-purpose programming language, designed with program safety and reliability in mind. It is very expressive, yet easy to learn and use. Caml supports functional, imperative, and object-oriented programming styles. It has been developed and distributed by INRIA, a French research institute in computer science and applied mathematics, since 1985.

Hardware verification

Tools

Formal Verification

  • Symbiyosys - SymbiYosis a front-end driver program for Yosys-based formal hardware verification flows. SymbiYosys provides flows for the following formal tasks: Bounded verification of safety properties (assertions), Unbounded verification of safety properties, Generation of test benches from cover statements, Verification of liveness properties
  • riscv-formal - A re-usable formal verification framework for RISC-V CPU designs.
  • MCY - mcy is a new tool to help digital designers and project managers understand and improve testbench coverage. [...] Given a self checking testbench, mcy generates 1000s of mutations by modifying individual signals in a post synthesis netlist. These mutations are then filtered using Formal Verification techniques, keeping only those that can cause an important change in the design’s output. All mutated designs are run against the testbench to check that the testbench will detect and fail for a relevant mutation. The testbench can then be improved to get 100% complete coverage
  • EBMC / CBMC - EBMC is a Model Checker for hardware designs. It includes both bounded and unbounded analysis, i.e., it can both discover bugs and is also able to prove the absence of bugs. It can read Netlists (ISCAS89 format), Verilog, System Verilog and SMV files. Properties can be given in LTL or a fragment of System Verilog Assertions

Simulation

  • Verilator - Verilator is "the fastest free Verilog HDL simulator". From a verification perspective it supports line coverage, signal toggle coverage and limited specification of functional coverage using SystemVerilog Assertions. It also allows one to write testbenches in C++ or SystemC.
  • Icarus Verilog -The excellent Icarus Verilog simulator. Slower than Verilator, but it supports full 4-state simulation (i.e. X's and Z's).

Build Systems and Continuous Integration

  • LibreCores CI - LibreCores CI is a service, which provides Continuous Integration of projects being hosted on LibreCores. The objective of the service is to improve the contributor experience and to increase trust to projects by providing automated testing and health metrics of the projects.
  • FuseSoc - FuseSoC is an award-winning package manager and a set of build tools for HDL (Hardware Description Language) code. Its main purpose is to increase reuse of IP (Intellectual Property) cores and be an aid for creating, building and simulating SoC solutions

Test / Program / Code Generators

Coverage

  • covered - Coverage analysis tool.

Linting and Parsing

  • svlint - Linter for SystemVerilog.
  • sv-parser - SystemVerilog parser.
  • Surelog - SystemVerilog pre-processor and parser.

Testbench Frameworks

  • cocotb - Python based testbench environment for many simulators.
    • python-uvm - A port of UVM 1.2 to Python and cocotb.
    • cocotb-coverage - Functional coverage and constrained randomization extensions for Cocotb.
    • Verification IPs - Various cocotb packages for common interfaces: AXI/Ethernet/PCIE.
  • fvutils/pyvsc - Python packages providing a library for verification stimulus and coverage.
  • chiselverify - UVM-like verification for the Chisel HDL.
  • UVVM - Universal VHDL Verification Methodology.
  • OSVVM - Open Source VHDL Verification Methodology.
  • VUnit - Unit testing framework for VHDL/SystemVerilog.
  • V3 - Verification framework.
  • ROHD Verification Framework - Hardware verification framework upon ROHD for building and executing testbenches.

Components / VIPs

Languages

Guides & Blogs

Conferences

Books

Courses

More

Contributing

Your contributions are always welcome! Feel free to submit a pull request with your suggestions.

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Welcome to the ultimate list of resources for formal verification techniques and tools. This repository aims to provide an organized collection of high-quality resources to help professionals, researchers, and enthusiasts stay updated and advance their knowledge in the field.

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